#include <iostream>
using namespace std;

class Person
{
public:
    int m_age;
    int m_height;
    int m_weight;
    int m_sex;
    int m_hair;
    int m_country;
    int m_yanzhi;
};

class Student : public Person
{
public:
    int m_score;
};

class Worker : public Person
{
public:
    int m_salary;
};

class UnderGra : public Student, public Worker
{
public:
    int m_grade;
};

int main()
{
    UnderGra ug;
    cout<<"sizeof(ug):"<<sizeof(ug)<<endl;
    cout<<"hello world"<<endl;
}